/
repeater.go
122 lines (105 loc) · 2.9 KB
/
repeater.go
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package main
import (
"bufio"
"bytes"
"net/http"
"time"
"github.com/lyobzik/go-utils"
"github.com/lyobzik/leska/storage"
"github.com/op/go-logging"
)
type Repeater struct {
logger *logging.Logger
handler http.Handler
storer *storage.Storer
repeatTimeout time.Duration
repeatNumber int32
stopper *utils.Stopper
}
func NewRepeater(logger *logging.Logger, handler http.Handler, storer *storage.Storer,
repeatTimeout time.Duration, repeatNumber int32) (*Repeater, error) {
return &Repeater{
logger: logger,
handler: handler,
storer: storer,
repeatTimeout: repeatTimeout,
repeatNumber: repeatNumber,
stopper: utils.NewStopper(),
}, nil
}
func StartRepeater(logger *logging.Logger, handler http.Handler, storer *storage.Storer,
repeatTimeout time.Duration, repeatNumber int32) (*Repeater, error) {
repeater, err := NewRepeater(logger, handler, storer, repeatTimeout, repeatNumber)
if err == nil {
repeater.Start()
}
return repeater, err
}
func (r *Repeater) Start() {
r.stopper.Add()
go r.repeateLoop()
}
func (r *Repeater) Stop() {
r.stopper.Stop()
r.stopper.WaitDone()
}
func (r *Repeater) repeateLoop() {
defer r.stopper.Done()
for {
select {
case <-r.stopper.Stopping:
r.logger.Info("receive stopping signal")
return
case chunk, received := <-r.storer.Chunks:
if !received {
return
}
r.repeateChunk(chunk)
}
}
}
func (r *Repeater) repeateChunk(chunkName string) {
r.logger.Infof("repeate chunk %s", chunkName)
chunk, err := storage.OpenChunk(chunkName)
if err != nil {
r.logger.Errorf("cannot load chunk from '%s': %v", chunkName, err)
return
}
defer chunk.Close()
chunk.ForEachActiveRecord(r.repeatTimeout, r.repeateRecord)
if chunk.Index.Header.ActiveCount > 0 {
// TODO: исправить и перенести в select выше, так как Chunks
// может иметь ограниченный размер.
r.storer.Chunks <- chunk.Path
}
}
func (r *Repeater) repeateRecord(chunk *storage.Chunk, record storage.IndexRecord) bool {
r.logger.Infof("repeate request from chunk: %v", chunk)
requestData, err := chunk.Restore(record)
if err != nil {
r.logger.Error("cannot restore record from chunk: %v", err)
return false
}
requestDataReader := bufio.NewReader(bytes.NewBuffer(requestData))
request, err := LoadRequest(requestDataReader, 1024*1024)
if err != nil {
r.logger.Errorf("cannot load request: %v", err)
return false
}
defer request.Close()
return r.repeateRequest(request)
}
func (r *Repeater) repeateRequest(request *Request) bool {
response, err := NewResponse()
if err != nil {
return false
}
defer response.Close()
r.handler.ServeHTTP(response, &request.httpRequest)
if response.IsFailed() {
r.logger.Errorf("cannot repeate request: %v", request)
} else {
r.logger.Infof("repeate successfull: %v - %v", request, response)
}
return !response.IsFailed()
}